On Fri, 23 Jul 2010 14:15:49 +0200 (CEST) "Rafael J. Wysocki" <rjw@xxxxxxx> wrote: > This message has been generated automatically as a part of a report > of regressions introduced between 2.6.33 and 2.6.34. > > The following bug entry is on the current list of known regressions > introduced between 2.6.33 and 2.6.34. Please verify if it still should > be listed and let the tracking team know (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=15977 > Subject : WARNING: at lib/dma-debug.c:866 check_for_stack > Submitter : Zdenek Kabelac <zdenek.kabelac@xxxxxxxxx> > Date : 2010-05-14 8:56 (71 days old) > Message-ID : <AANLkTikyx2eaxaiUCFDSfpmn1UG0t2GOxArz6F4wp1LJ@xxxxxxxxxxxxxx> > References : http://marc.info/?l=linux-kernel&m=127382742729825&w=2 looks like easy to fix this. But seems that linux-next still has the bug. Or a fix was already posted somewhere else? = From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> Subject: [PATCH] DVB: dib0700: fix the usage of stack buffers for DMA We can't use a stack buffer for DMA. This should fix: http://bugzilla.kernel.org/show_bug.cgi?id=15977 Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> --- drivers/media/dvb/dvb-usb/dib0700_core.c | 15 ++++++++++++--- 1 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c index 7deade7..54a0d2c 100644 --- a/drivers/media/dvb/dvb-usb/dib0700_core.c +++ b/drivers/media/dvb/dvb-usb/dib0700_core.c @@ -301,14 +301,23 @@ struct i2c_algorithm dib0700_i2c_algo = { int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props, struct dvb_usb_device_description **desc, int *cold) { - u8 b[16]; - s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0), - REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT); + void *b; + s16 ret; + + b = kmalloc(16, GFP_KERNEL); + if (!b) + return -ENOMEM; + + ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0), + REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, + 0, 0, b, 16, USB_CTRL_GET_TIMEOUT); deb_info("FW GET_VERSION length: %d\n",ret); *cold = ret <= 0; + kfree(b); + deb_info("cold: %d\n", *cold); return 0; } -- 1.6.5 -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
